Oil cooling system



Ma 16, 1933. R, H KE 1,909,637

OIL COOLING SYSTEM Filed March 31, 1950 2 Sheets-Sheet 1 R. SCHITTKE,637

OIL COOLING SYSTEM May 16, 1933.

Filed March 31, 1930 2 Shets-Shet '2 Q k u g: "-a w Q 3 x v a N Q N '1 wI 3 w: Q1 a m 3 w a s I Q Q gwvento'a Patented May 16, 1933 UNITEDSTATES ROBERT SCHITTKE, or LANSING, MICHIGAN OIL COOLING SYSTEM-Application, filed March 31, 1930. Serial 1 I o...440 ,3 84 .I r 1' Thisinvention relates primarily to a novel oil cooling and engine coolingorganization but it also includes various no'vel sub-combinations. Forexample, it is an object of the invention to operate an oil pump by adirect and co-axial forward extension of a camshaft, said pump beingpreferably carried in an external and accessible position adjacent anoil cooler,as, by a housing which extends over a sprocket gear employedin the driving of said camshaft; and the invention preferably includesnovel means for feeding or priming said pump from a conduit containinglubricant under pressure, -such as a conduit extendinglongitudinally ofsaid shaft and included in a gravity or pressure oil feed system. 7 r vIt is also an object of this invention to provide for the directoperation of a water pump from a fan shaft,-'the rotor .of said pump,when of centrifugal type, being carried by said shaft; and, in preferredembodiments of the invention, in order that the pumped Water may advancethrough an oil cooler disposed therebelow, a bifurcate or other cooleroutlet fitting may serve as a bracket for the support of not only saidcooler but said water pump and said fan shaft.

It is an object of this invention to provide 5 integral with a fittingwhich serves not'only to provide for the exit of cooling fluid but forthe support of said cooler and parts thereabove. Said cooler ispreferably similar in type to the R-amsaur-Cha se cooler (described andclaimed in application S. N. 407,730 filed Nov. 16, 1929) in that itincludes a set of tubes having hex ends through which water maydescendwhile the oil to be cooled is advance-d transversely therebetween; and,in one advantageous embodiment, the cooled lubricating fluid may bepermitted to descend into a pan in proximity to the intake of anadditional pump,the latter being ordinarilyinoluded inv a pressure-feedor-service circuit which supplies various bearings and Which includes amentioned conduit from which the pump of the cooling circuit is primed.I

Other objects of the present invention','includin'gjthe positioning of acooler and pumps favorably to direct cooling, may be best appreciatedfrom the following description of an illustrativeembodimentthereof,ltaken in connection with the appendedclaims and theaccompanying drawings: 7 r I Figure lis-a diagrammatic side elevationalview showingan internal'combustion engine in which one embodiment of thepresent I invention is incorporated. r

F1gure2 1s a vertical section correspondingvto a leftcentral portion ofFigure 1. Figure 3 is a front elevational view, with parts sectionedsubstantially as suggested by a line 33 of Figure 2. p I i f I i Figure4 is a hor'zontal sectional view, taken substantially as suggested 5 thebroken line 1 4 of Figure 3. f

, Referring to that embodiine t of the-pres out invention which has beenselected for purposes of illustration, 7 an engine block 11 is shown ashaving secured tli'eiiebelow an'oil pan 12 and as comprising(along withnumorons usual parts) a camshaft '13, driven (through a sprocket chain,of usual type) by a terminally secured gear lh the .latterj beingenclosed within a housing At the front of the block 11, there is shown arest to advance air for a cooling effect, a radiator B being shown infront thereof. v Connng now to novel features of the pres- [entinvention, the block 11 is shown carr ing, at the front thereof, anoil'pum'p'O; an oil cooler C.,,and a water pump P. i Camshaft 13 isshown as carrying, by means.

of screws 16 \"hich'serve also to'retain the gear 14) a plate 17 havinga non-circular central opening at 18,the partsla'st referredto beingemployed t'o transmit rotation to an extension shaft 19, terminallyinterfitting within said opening Theshaft 19 is shown as extendingthrough a bearing 2-0,,provi ded upon the housing 15i, and as adapted toimpart-movement to aro'to'r in'thc-forin of a gear 21,coop'erating witha companion gear 22 and housed withln a concave' and fixed ele- I ment23, serving as an oil pump chamber.

This chamber may be secured to the housing 15 by means such as screws24; it may be provided with an oil inletat 25 and with an oil outlet at26; and, if desired, resilient means such as a compression spring 27,within a bearing thimble 28, may cooperate withan outer terminal bearingplate 29 in normally maintainingthe shaft extension 19 in theillustrated relation to camshaft 13. The camshaft 13 is shown asprovided witl a central and longitudinally extending conduit 30, whichmay be included in a-pressure lubricating system; and, in order toassure the presenceofsufiicient lubricant for aprimoil pump chamberprovided by the concave element 23, or its equivalent.

-c It will be obvious that means of the described charactermight beemployed to pump 3 oil into any suitab e pressure reservoir or elevatedcontainer, permitting direct or indirect flow into a pressure orgravitysystem, or other lubricating system, including the mentionedconduit 30; but the oil pumpoutlet 26 is herein shown as connected, by apipe 37, with the oil cooler O. 6.; and this oil cooler preferablyincludes not only oil headers (which may be comprised in a main casting39, with which an oil inlet fitting 40 and an oil outlet fitting 41 maycommunicate) but also a water inlet header element 42 and and a wateroutlet header element 43,-the latter being shown as a downwardlybifurcate bracket which is inte ral with water delivery fittings 44, 44,provi ed with means for their direct attachment to the engine block 11,opposite openings into the jacket thereof.

Between the main casting 39 and the respective water headers 42 and 43,there may be interposed horizontally extending frames or plates 45 and46, optionally associated with gaskets 47 and 48, said frames or platesbeing constructed to receive and interfit with hexagonal terminalportions 49 of substantially cylindrical tubes 50,the ends of said tubesbeing so sweated or otherwise secured to one another and to said platesor frames as conduct water from header 42 to header 43, and of suchexternal diameter as to permit a fl ow of oil in thin and repeatedlybroken films transversely therebetween. Means such as bolts and/orscrews 51, 52 may be employed to hold the mentioned parts in theirindicated relationship; and not only the described cooler assembly butalso a suitable water pump W. P., or said pump and/or a suitable fan Fmay also be supported from by means such as a usual pulley 60; it may belubricatedthrough passages, such as are indicated at 61 and 62, in thebearing casting 54; and saidshaft or one of said castings should also beprovided with a water intake opening 63,-such as that shown as connectedwith a pipe 64, extending toward the radiator R.

It will be understood that any desired alternative Water connectionsmight be provided upon a pump operated by a fan shaft in substantially'the described manner, but that the use of hollow bracket or brackets44, 44

to conduct the water intothe respective sides c of the engine jacket(preferably via the described heat exchange unit, insteadof bya directreturn of the water to a water cooling radiator) ishighly advantageousin its symmetrical equalization of cooling effects in the engine block.Radiator B may thus be either a sole water-cooling radiator or anauxiliary radiator for the cooling of a fraction or a separate quantityof circulated water to an exceptionally low temperature; but, in case asingle water-cooling circuit is provided,

radiator B may be connected, as by a usual pipe 66, with the outlet"from the jacket of engine block 11,any desired use of thermostaticdevices being, of course, permissible, even though not requisite to thepresent invention.

The oil cooler O. C. is shown as provided with a cooled oil deliverypipe 67 and the oil advancing therethrough obviously might be conducteddirectly to the various bearings that require lubrication and/orcooling; or :7

said oil might be delivered to a receptacular element at any preferredelevation and/ or pressure. However, in case the delivery pipe 67, shownas connected with the outlet fitting 41 conducts the cool oil back intoa pool in the oil pan 12, or its equivalent (in preference to its beingso serially connected with a service circuit as to require but one pump)means such as an additional pump 0. P. may be used to advance the oiltherefrom into a pressure system,- such as that diagrammaticallyrepresented by an additional pipe at 69 and the mentioned camshaftconduit 30. In this case, the intake 70 of the pump 0. P. is preferablyso positioned as promptly to receive scribed cooling circuit. In thiscase oil may be initially admitted to the cooling circuit pump throu hthe drive shaft thereof, as

above descri ed, and it will be understood that the normal operation ofsaid pump may soon create such aback pressure therein as substantiallyto discontinue inflow through said shaft,-the use of any valve (notshown) in said shaft being optional. It will be obvious that thementioned pumps 0. P. and W. P. and alsothe cooler O. C. are positionedfavorably to direct cooling by fan F.

Although the foregoing description has included complete details of butone embodiment of the present invention, it should be understood notonly that various features thereof might be independently employed butalso that numerous modifications, additional to those incidentallysuggested herein, might easily be devised by lubrication engineersfamiliar with the foregoing,all without departure from the scope of thepresent invention.

I claim:

1. In a water-cooled engine including a block above an oil pan: meansfor supporting from said block a fan shaft and a camshaft; a coolingwater pump and an oil pump respectively driven from said shafts; a watercooled oil cooler interposed between said pumps, and connections betweenthe cooler and the pumps for conducting water and oil to the cooler.

2. In a water-cooled engine including a block above an oil pan means forsupporting from said block a fan shaft and a camshaft; a cooling waterpump and an oil pump respectively driven from said shafts; a watercooled oil cooler interposed between said pumps,--a rotor. of one ofsaid pumps being co-axial with one of said shafts, and connectionsbetween the cooler and the pumps for conducting water and oil to thecooler.

3. In a water-cooled engine including a blockabove an oil pan: means forsupporting therefrom a amshaft; and an oil pump driven from saidshaft,said camshaft being provided with a passage which receives oilunder pressure; said oil pump being provided with an inlet.communication with said passage.

4. In a water-cooled engine including a block above an oil pan: meansfor supporting from said block a fan shaft and a camshaft; and a coolingwater pump and an oil pump respectively driven from said shafts,-saidcamshaft being driven by a gear having a fixed housing, and one of saidpumps being carried by said housing.

5. In a water-cooled engine including a block above an oil pan: meansfor supporting from said block a fan shaft and a camshaft; and a coolinwater pum and an oil pump respectively riven from s afts,one of saidshafts being surrounded by a fixed housing which provides one wall of achamber of the pump driven therethrough.

-6, In a water-cooled engine including a block above an oil pan meansfor supporting from said block a fan shaft and a camshaft; a coolingwater pump and an oil pump respectively driven from said shafts; and awater cooled oil cooler interposed between said pumps,one of said shaftsbeing tenninally surrounded by a fixed housing which provides one wallof a chamber of the pump driven therethrough, one of said pumps beingsupported from said cooler. v

' In an internal combustion engine comprising a block which provides ajacket for cooling water: a. pump for said cooling water; and supportingmeans for said pump,

including a hollow bracket upon said block,

conduits within said bracket being in communication with the interior ofsaid jacket,

for a. substantially symmetrical advance of cooling watertheretlirouglnv 8. In an internal combustion engine comprising a blockwhich provides a jacket for cooling water: a pump for said coolingwater; an oil cooler; and supporting means. for said pump andsaidcooler, including a hollow bracket upon said block, said coolerbeing interposed, between said pump and said bracket, in the circuit ofsaid cooling water.

9. In an internal combustion enginecomprising a block which provides ajacket for cooling water: an oilcooler; a pump therefor; and a bifurcatebracket, upon said block, providing means for the advance of Waterthrough both said cooler and said block.

v10. In a lubricating system for an'internal combustion engine whichincludes a block providing a jacket for cooling water, and

shaft bearings to be lubricated: an oil cooler an oil pump; means foradvanclng cooling -water through sald jacket and said cooler;

an oil cooling circuit which includes said cooler and said oil pump; anoil service circuit which includes said bearings; and means ofcommunication between said circuits through one of said shafts.

11. In a lubricating system for an internal combustion engine whichincludes a block providing a jacket for cooling water and shaft bearingsto belubricated, an oil pan being disposed therebelow; an oil cooler;means for advancing cooling water therethrough; an oil cooling circuitwhich includes an oil pump; and an oil service circuit,said circuitsbeing in communication within said pan, and also through a passageleading into said oil pump, for a priming efiect.

12. In a lubricating system for an internal combustion engine whichincludes a block and shafts having bearings: an oil cooler; means foradx'ancing cooling Water therethrough; and an oil cooling circuit whichincludes an oil pump,said oil cooler being mounted upon the front ofsaid block and 19 said pump being adjacent thereto and provided with arotor Which is co-aXial with, and driven directly from, a shaft of saidengine. 13. In an internal combustion engine which is provided with acooling fan at one end thereof: a cooling and lubricating system whichincludes an oil cooler and also a plurality of pumps so positioned as tobe cooled by said tam-one of said pumps being sup- 20 ported by meansthrough which a fluid is advanced.

14. In a liquid cooled internal combustion engine, a cooling liquidpump, a lubricant pump, a lubricanttemperature regulator 10- catedadjacent to and between the pumps, and connections between the regulatorand the pumps for conducting cooling liquid and lubricant to theregulator.

15. In an internalcombustion engine, a 39 lubricant sump, a lubricantpump located at a higher level than the sump and adapted to withdrawlubricant therefrom, a lubricant pump located Within the sump, and meansto prime the first mentioned pump including a passage communicatingtherewith and with the second mentioned pump;

16. In an internal combustion engine, a lubricant sump, a lubricanttemperature regulator, a lubricant pump adapted to withdraw 49 lubricantfrom the sump, circulate it through the regulator and return it to thesump, and a second lubricant pump having its intake located in the sumpadjacent the point at which the first mentioned pump dischargeslubricant thereinto.

17. In a water cooled internal combustion engine, a lubricanttemperature regulator supported from the engine, a water pump mounted onthe regulator and connections between the regulator and the pump forconducting Water from the pump to the regulator. I i

18. The invention claimed in claim 17 in which the means for supportingtheregulator from the engine constitutes a Water passage communicatingwith the water acket of the engine.

In testimony whereof I attix my signature.

ROBERT SCHITTKE.

